Gelrafhlöður MVG 12 V 200 Ah

The Mastervolt Gel MVG 12/200 battery is a service power source designed for medium and large embedded systems (12V and 24V). Thanks to its gel electrolyte technology, it is fully sealed, maintenance-free, and ideal for intensive cyclic use aboard your boat.

This battery has a nominal voltage of 12 V and a capacity of 200 Ah (C20). It is perfectly sized to meet the high power requirements of your onboard equipment.

Gel technology offers several major advantages:

No maintenance required.No gas formation during normal use, enabling safe installation.Excellent resistance to repeated deep discharges.Very low self-discharge, ideal for periods of inactivity or winter storage.

Yes, absolutely. Since this Gel battery produces no gas emissions during normal use, it can be safely installed in confined or unventilated spaces aboard your vessel.

The MVG 12/200 battery is a robust unit. It weighs 70 kg and its overall dimensions (including terminals and handles) are 518 x 274 x 238 mm (Length x Width x Height).

It is strongly recommended to install the battery in a vertical position (upright). If a horizontal installation is absolutely necessary due to your cabin layout, ensure it is never mounted on its shortest side.

To ensure optimal operation and proper heat dissipation, you must maintain at least 1 centimeter of space between each battery in your service bank.

You must use a charger with an IUoUo charge curve (3-stage charging). Using an unsuitable charger could irreversibly damage the battery.

This battery accepts a maximum charging current of 100 A, which corresponds to 50 % of its nominal capacity. This allows for fast and efficient recharging via your alternator or shore power charger.

To maximize the lifespan of your Mastervolt battery, it is recommended to limit regular discharges to 60 % of its nominal capacity. Avoid deep discharges and fully recharge it after each use.

No, the MVG 12/200 battery is 100 % maintenance-free. You do not need to check fluid levels. Simply ensure the terminals remain clean and tight, and recharge it regularly.

Although primarily designed for service and deep cycling, it offers very good starting capabilities with a DIN CCA of 630 A and an SAE CCA of 1100 A.

The recommended operating temperature is 20°C. It tolerates a range from -20°C to 45°C. Note that every 10°C increase above 20°C halves its lifespan, and very cold temperatures reduce available capacity.

Yes, you can create a 12V or 24V battery bank. However, all batteries connected in series or parallel must be of the same brand, type, capacity, and have the same state of charge. Never mix new batteries with old ones.

To clean your battery, use only a soft, damp cloth. Never use additives, acidic products, solvents, or abrasive powders that could damage the plastic casing.

Absolutely not. This is a sealed valve-regulated lead-acid battery (VRLA) with gas recombination. The pressure valves are factory-sealed. Attempting to open the battery will irreparably damage it and void its safety.

At 25°C, charging parameters must be set to:

Float voltage (maintenance): 13.80 VTabsorption voltage: 14.25 V (for a maximum of 5 hours)Temperature-compensated charging (-30mV/°C) is highly recommended.

Yes, the MVG range is excellent for wintering thanks to its very low self-discharge. Simply ensure it is fully charged to 100 % before storage, and recharge it if the open-circuit voltage drops below 12.3 V.

This battery is fitted with type A terminals. During installation, ensure you use the correct battery lugs and tighten all connections properly to prevent energy loss or overheating.

Incomplete charges can damage Gel batteries. It is therefore essential to recharge the battery to 100% of its capacity regularly, ideally at least once a week during active use of your boat.